Delaware gazette and state journal. (Wilmington, Del.) 1883-1902, 1887-05-12

TrnnsSAiitef, Receiver and Gall In
one and Cheap.

cation OF forces, which, by the way, he
only puts into practical shape, the idea
with the American gentleman
who kept him from starving, has been
tested, and, under the patronage Of the
will soon revoluronize the
motive agents of machinery, and about q
mouth ago the first experiments were |
made with an instrument invented by DR.. |
O. Herz, which seems destined TO reyolu- |
tionize telephony.
A twelvemonth is long time to refer |
back to, but some of your readers may |
perchance remember the description that
gave in january, 1886, Of modification
--oalied the button telephone lin the call
buttons now in use in the ordinary install
lations Of electric bells; it was combina-
ton Of bells, an automatic commutator
and telephone, by which the same instru-
ment is made 10 become alternately re-
ceiFer and transmitter. At the time of
its presentation to scientific specialists
this innovation attracted good deal Of
attention, but DR.. Herr was not fully sat-
ished; as he then stated, he wanted his
instrument to be not only telephone
call, but also complete telephone, and
this he has oontrised 10 effect, as was
proved in series of interesting expert
ments in the presence of the delegates of
the French and Belgium telegraphic ad-
ministratiye departments, number of
capitalists and few representatives
of the local and foreign press,
over the overhead wires connecting
Paris with Brussels, distance of 800
kilometers, or 220 miles. These expert
ments answered every requisition of the
examiners, by whom they were considered
TO be the most conclusive ever made with
nry tenn for 10th long and short dis
tasnoes, the instruments used surprising
in compaetness and power any other now
known, considerations which, together
with the righteousness Of It's construction,
must bring it into prominent notice as
perhaps the most practical of all achieve
ments in the development of telephony.
IL is the button telephone revised and
corrected, and by the addition Of micro
phonic transmitter is made to be COM
plete telephone post, less tho battery,
which either with or without the agency
of a central station can establish perfect
communication with extreme distinotness
and for an Insignificant outlay.
Not to enter into technicalities, which
to be comprehensive would necessitate
illustrations and diagrams, shall give a
brief description of the tiny apparatus
which resembles in appearance the ordi.
nary push-button institutions in domestic
use il consists Of disk, about two
inches in diameter, containing the trans
mitter or mierophone, and a removable
cap, the telephone receiver. The push
button or call occupies the centre of this
cap, or outer surface of the telephone,
which as have said is separabls, but is
permanently connected with the fixed
disk by cord of insulated flexible wires
OF any convenient length. 70 open con-
versation the push. button on the cap is
pressed and the circuit is completed
through the battery and signal bell with
the station With which 1t q desired to
correspond. The return sigma Is given
in similar manner and the telephone re-
ceiyer--the movable cap--beiug taken oil
from the disk ON the wall conversation
can be carried on between the CORE
spondents with no more effort Of voice
than If both were in the same room, so
extremely sensitive is the microphoniC
transmitter thus exposed. Between rooms
in the same house, or houses in the samt
street, that is to say, over short dis
taneeB, it is not even necessary for thu
speaker to stand close to the instrnmen
nor to raise his voice above its ordinar,
3iapason. OF course when the distance
are great, as was the case in the recen
experiments, the operator must approach
the apparatus, hnt not even then need b
put his mouth to it nor shout as with a
other systems,
This alone, il must be admitted is q
immense advantage on the score of com
fort and convenience, but there is anothe
which / have attended to, and that is il
cheapness; the whole apparatus can
made and set up for so cents, and it ca
be applied to the wires of any of the cleo
trio bell apparatus in existence, whenc
it follows that its general adoption, whic
S SlS5Gs-., g DC CERTAIN, ll.usl III oAdSe
complete modification of the presaI
forms g talauEaia r!251urTs At stree
doors, in the inner rooms of priyai
houses and hotels, everywhere, in shor
where telephony is employed, DIR. Herr
mierotelephone push button is applicabl
and makes it possible to give and recei'
orders, to know who rings at your do
and what his business is without moviI
from your chair, and to know also III
there is no mistake about the individ
nlity of your interlocutor, as the tone
the speakers voice is perfectly preserve
Its advantages in everyday domestic Ii
need not be dwelt upon, as they are sci
apparent, and no one can prefer
TO I1y that as a means Of col
munication between railway wagons al
conductors of trains the invention will
highly appreciated by the public viii
is prepared to be beeomingly grateful (
any innovation which would give TO ira
elers ID feeling of security that is nc
utterly wanting. The ASSASSIN of 1
Project de rEure, who is still 1T lars
would not have been 30 free with his
volver had he known that his Wet
might have obtained help by simply aF
ing for it instead Of as arrangements n,
are, being Obliged 10 smash ii pane
glass and pull string which commul
Gates with another string which may
may not set in motion mi alarm bell
the far end of tho train. The railw
companies have begun to eXperimt
with the new apparatus, aud have SO
IT working at the porto eOcherc Of one
the private houses Of Paris where n &C
Versation WINS kept MP butwsbm persons
the street and the dWellDrs on sin
floor Hat. who never stirred from th
aeats nor opened The door If their apa
ment.
Al GREAT hDlliHE Y,Fnvprbiollty mr.
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anca,t{an.so ~ Il eo ,S.7 I,i'y ~
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in%s ~ "i'' .i..r st,a,, . "esSslpe Y y
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